Riveting machine



June 23, 1936. R HAVENER 2045,55

RIVETING MACHINE Filed Nov. 20, 1954 3 Sheets-Sheet l p /f 197% W 5&-

fins 23, A. R. HAVENER RIVET ING MACHINE Filed Nov. 20, 1954 3 Sheets-Sheet 2 June 23, 1936. Y A. R. I -IAVENER 2,045,550

IRIVETING MACHINE I I Filed Nov. 20, 1934 5 Sheets-Sheet 5 PatentedJune 23, 1936 v I Q UNITED s r-Ares PATENT QFFlQE Arthur R. Havener, Wayland, Mass., assignor to JudsonL. Thomson Manufacturing Company, Waltham, Mass., a corporation of Massachuse ts Application November 20.1934, Serial No. 753,853

10 Claims. (01. 218-2) This invention relates to riveting machinesand "Fig. 9 is a side elevation of the male clutch more particularly to the support for the work in member; and g which the rivets are set. Fig. 10 is a horizontal sectional view on line In the use of riveting machines, it is generally Ill-l in Fig. 8.

customary for the operator to place by hand the 1 Referring to Figure 1 of the drawings, l2 indiwork in proper position on a fixed work support cates the frame of the machine mounted on a and then to start the machinein operationto set I base l3 and having an upper overhanging'a'rm M. the rivets by pressure on a foot-treadle. When A rivet driver I5 is mounted in the lower end of a the work is small in size, the danger of injury slide [6, rectangular in cross section, which is to the hands of the operator through a premature reciprocated in suitable ways in the arm- M by a 10 starting of the machine or'in the operation of lever .Il pivotally connected at one end to the the machine is greatly increased. 'To avoid. such upper end of the slide. The lever I1 is pivoted injuries requires careful positioning and handling on a pin l8'in an arm l9 pivotally mounted at its of the work which results in slowing down the lower end on a pin 29 set in the frame l2. The

speed of operation and the amountof work turned rear end of the lever I1 is pivotally connected by 15 out, thereby increasing the cost of production. [a pin 2| to a member 22, which at its lower end is One of the important objects of the invention mounted upon a crank 23 (Fig. 7 of a'shaft 24 is the provision of a work support for riveting and ',-rotatably mounted in the frame. 'The member 22 similar machines which is normally in an inoperis made up of two parts having a screw-threaded ative position for receiving the work and which is fengagementwith each other permitting the length so adapted tobe moved into an operative position j of said member to be increased or decreased at before the machine is started, thereby eliminating 'jwill. v i all danger of injury to the operators hands. f j. .()n the extended base l3 of the frame is mount- Another object of the invention is the provision ed a motor 30 having a shaft 3| provided with a of means whereby the depression of the .footworm gear 32 which meshes with a gear 33 fixed .15 treadle usually employed to startthe machine to a shaft 34 rotatably mounted in the frame l2. first, moves the work support from its normal A pinion 3.5, also fastened to the shaft 34, meshes position to an operative position beforeitfuncwithanidler gear 36 adapted for free rotation on tions to start the machine. i the. shaft 24 which constitutes the driving mem- Other objects of the invention will be input ber of a two part clutch for rotating saidshaft. so obvious and in part more particularly, described the other or driven member 31 of said clutch hereinafter. a 3 g being fastened to the shaft 24.

In the accompanying drawings illustrating one The driving member 36 is recessed on one side embodiment of my invention, Figure 1 is a left )at 39 (Fig. 10) and provided with'a plurality of side elevation of a riveting machine having a pins 40 spaced at intervals around said recess work support constructed and adaptedto be .opand the driven member 31, projecting into said erated in accordance with myv invention; recess, carries a dog 4| pivotally mounted on a Fig, 2 is a similar view of the front portion of pin 42, which dog is held by a springactuated the machine. showing the work support in normal pin 43 in position for engaging one of said pins inoperative position; Y as shown in Fig. 8 for locking the two parts of 40 Fig 3 is a View Similar to 2 showing t the clutch together in order to rotate the shaft work support in operative position preliminary to 1 t dlrectlon'slflown b the wstarting the machine; M The gear or driving member 36 1s unlocked Fig. 4 is a front elevation on an enlargedrscale Pm I member 3 of the Clutch b a of the same; sl1de 4t1i1wh oh 15 caused t; engage the outer ends.) Fig. 5 is a front elevation of the treadle' operat- 7 t ig f gg 8 ig q i i ed means for starting the machine, the'parts be- 3 W e pm 6 p051. on s W in Fig. 8 to that shown in Fig. 9, wluch permits s in Starting Position; the driving member to rotate freely while the so a- F slde elefatwn the Same I driven member of the clutch and the shaft 24 to Fig. '7 is an elevation looking from left to Ilghf, which it is fastened remain Stationary v in Fi 1 On an enlarged Scale of h Clutch h- The slide 45 is mounted for reciprocation in a anism of the m j A I suitable way formed in the frame of the macl'f e Fig. 8 is a side elevation of the two clutch memand is provided with an outwardly projecting arm bers with certain portions broken away; I .41. A spring 48, constantly under tension. is

attached at one end to said arm and at the other end to a pin 50 in said frame, which spring holds the slide in operative position for engaging the end of the dog to disconnect the two parts of the clutch (Figs. 1 and 7).

For withdrawing the slide from engagement with the end of the dog 4| "to permitth'e spring actuated pin to force the dog into'engagement with a pin 40 to lock the two parts of the clutch together to start the machine, suitable means, adapted to be operated by a foot treadle,.is provided (Fig. 7). A lever 52 is pivotally mounted at its lower end upon a pin 53 set inatheiframe and fastened to the lever is a short lateral arm 54 operatively connected -to a foot treadle by means hereinafter described. Pivotally mounted on a pin 55 in the upper end of the lever 5,2 is a pawl 56 which is held in position for engaging the arm 41 on the slide by a spring 511undertensionvconnectediatone end to a pin 58 set in .the tail of the pawl and at its other end to a hook .59 on the lever. The pin 58 servesalsoas astop engaging one side edge of the lever to hold the .nose -of the -pawl.in operativeposition'ffor moving the slide .to the right when the. lever is turned 'bydepressing .the treadle. In this operation the nose of thepawl engages the arm and movesithe slide tothe right until the tail of thepawl strikes -a-.screw-60 .threaded in a projecting lug 6| on the .frame when the further movement of 'the lever-.causes.the -nose of the pawl toidisenga'ge vfromrthearm onthe slide, permitting 'thespring -4 8 to returnflthe slide instantlyto operative ,posi- -tion fordisconnecting the two .parts of 'theclutdh atthe-endofone complete revolution. .The screw -6l :ma-ybe held in adjusted position .by .aist

nutBZ.

Bivotallyanounted on a bracke'tifilfastenedlto zther-front .of the-machine is a work isupport T65 carrying an anvil 66 within whichis mounted a spring pressed pilot 6'! for centering rive'ts. off..a tubular character during .the setting ,-.process. Therwork support is provided with twodepenl'iing parallel bel1-crank.arms 68 which receive between :them the -forward-end of the bracket .and are -pivotally: mounted on apin =69'set-in said forward :end. .-l?i-votallymounted ona pin {10 in thelower end of the vbracket--64 is.a .lever .12, the Iforward i-endof .which ispivotallymonnected by ajpin'13 to a-link J4, -the upper end of .whichisconnected by a pin 15 to the ends-of the armsli'8ofl'thework irsupport. Lhe rear end of theleverisconnected .rby-az pin 1-6 .to an elongated flatl link "[1 I having. its 1lower=end provided with a slot 18. The work -support is-held normally in an inoperative .po'si- -tionr-by'means hereinafter described.

For first throwing the work. support in'toian :operativepositionand then starting the machine, rafoot treadle82 isso-connected to 'thelever T12 and to the clutch slide operating .mechanism that a preliminary depression .of .thetreadle moves .the work support .intooperative position and afurtherzdepression starts the machine.

The .foot treadle-82, which. is pivotally mounted Fonta :pin 81 in'aiioor support or-bracket 183, is connectedto the rear end of -:the --lever!;2 :by a treadle'rod lILiblock 85 and spring- 89. The' block 3'5 isadjusta'bly fastened on the rod 'bysaPscreW' BE "and is provided in one endwith a =pin"i8 l which projects through the-slot18 in link' l'land'is sli'dably hel'dtherein by a washer 88. The spring 89 is'connected at its lower end to the pin BT'in the'block'and at its upper'end to the pin TB'in the lever 1'2. The-spring is adjusted to normally hold the pin 81 in the upper end of the slot in the link. The link serves as a guide to prevent undue lateral movement of the block and upper end of the treadle rod. A spring under tension and connected at one end to the bracket 83 and at its other end to the heel end of the treadle 82 holds-the latterlin raisedposition and-through theinstrumentality of the treadle rod 84, pin 81 and link 11 maintains the work support normally in inoperative position. Any other. suitable meansmay be provided for this purpose.

"The block is also bored to receive loosely the .iowerrendroia rod.=90, the upper end of which is .turnedrandiinserted in a hole in the end of the arm fl ohthe-icluteh slide operating mechanism. A spring 9| connected at one end to a screw eye .92..in.the-base 13 of .the frame and at its other end to'a'pin'53 stin the rod 90 holds the latter fiin ndised position. Fastened to the rod 90 by a =.screw.94-,below.the block 85 is a collar adapted .ilto Ebe engaged by the 'block "when the treadle is depressed 'for' pulling the 'rod '9 0 downwardly to ,start..the..machine. By adjusting the distance 't '"en The block and the collar, the time of lstartingnthe machine in relation to the -moving o'f ithe work support into "operative position can .Zbe closely regulated. A screw stop v96 threaded Iirito'the rear. face of the worksupport servesto fa'd just'lth'e operative "position or the work sup- .port and'tanvilitotherivet driver.

Ther'ivetslIsedin "the machine are of the well- Ikn'own l-tubu'lar "type andtar-efed to a rivet holder IH'I "froinafiopper "(not shown) througha raceway 188, alLiUf which are "of a construction well known'tothwetkilledfin the art.

'IIn the operation of "the'machine, the operator liilaces the 1 Work, which has been previously punched. to ire'ceive "the *rivet, on the anvil 66 itime,the"work' support is in an inoperative posiftibn jincliried jtoward {the "operator as shown *in Figured. l iiterthefwork has'been properly positionefd,"the; operator-exerts a downward pressure on :the fiopt *treadle -Which pulls the treadle =rod 8'! :antl'block 85 downwardly and through the .gspring 89 "pulls the -rear end of lever '12 down- 'wardiy "which; -through the link "14, turns the Work'suppoft into an' operative position. In this .movement .the spring is*o"f =suflicient strength to ."resist" the tdownward pullso that the 'pin 8"! re- 5 I T! (Fig. 3) until the stop 96 on the work=support :comes into "engagement with the :upper portion "offthe .bra'cket 64. Further movement of the worksuppprtj-is stopped'and the further depression diithe'ifoot .trea'dle "thereafter then disten'ds the spring 89, the *s'lot inthe link permitting 'free "movement of i the pin "81 and therefore 'of the "block 85;downwardly" toeng-age the collar a5 and to pull the clutch rod 90 down to startithe ma-' ehine. "Phe operator "fmaintainsthe .;pressure on the treadle uri-tll the setting .uperation has" been completed.

QnE-theLreIease.iof' the rpressure, the spring 80 operates on the treadle to throw the'work sup- -:port :ba'ckrto ;;inqperative position. Since the position in alignment with the rivet driver. At the same time, it conduoes to a rapid and accurate positioning of the Work which increases the speed of the work and reduces the cost.

Although my invention is herein shown as embodied in a riveting machine, it is not to be limited thereto as it is capable of use in connection with other machines of that general class.

What I claim is:

1. In a machine of the class described, the combination of a work support having a pair of depending bell-crank arms, said arms being pivotally mounted for moving said work support from a normally inoperative to an operative position, a foot treadle and treadle rod and means carried by said rod whereby a depression of the said treadle first moves the work support to operative position and then starts the machine in operation.

2. In a machine of the class described, the combination of a work support having a pair of depending bell-crank arms, said arms being pivotally mounted for moving said work support from a normally inoperative to an operative position, a foot treadle and treadle rod, means carried by said rod whereby a depression of the said treadle first moves the work support to operative position and then starts the machine in operation, and means for returning said work support to inoperative position when the pressure on said treadle is released.

3. In a machine of the class described, the combination of a work support having a pair of depending bell-crank arms, said arms being pivotally mounted for moving said work support from a normally inoperative to an operative position, a foot treadle, a treadle rod, means carried by said rod whereby a depression of the said treadle first moves the work support to operative position and then starts the machine in operation, and a spring for returning said work support to inoperative position when the pressure on said treadle is released.

4. In a machine of the class described, the combination of a work support having a pair of depending parallel bell-crank arms pivotally mounted, means for holding said work support normally in an inoperative position, a lever operatively connected at one end to said arms, a foot treadle, a treadle rod, resilient connections between said treadle rod and the other end of said lever whereby a partial depression of said treadle turns said work support into operative position and means carried by said rod whereby a further depression of said treadle starts the machine in operation.

5. In a machine of the class described, the combination of a work support having a pair of depending parallel bell-crank arms pivotally mounted, means for holding said work support normally in an inoperative position, a pivotally mounted lever operatively connected at one end to said arms, a foot treadle, resilient connections between said foot treadle and the said other end of said lever including a treadle rod and a spring, said spring being of sufiicient strength without distension to turn said work support to operative position when said treadle is partially depressed and being distensible to permit further depression of said treadle after said work support has reached operative position and means carried by said treadle rod whereby said further depression of said treadle starts the machine in operation.

6. In a machine of the class described, a work support having a pair of parallel depending bellcrank :arms, said arms being pivotally mounted for moving said work support into and out of operative position, a lever for controlling the movement of said work support, a foot treadle, a treadle rod, connections between said lever and said treadle rod whereby whenever said treadle is depressed said work support is turned into operative position, said connections including a spring to'permit further depression of said treale after said work support has reached operative position, said spring being of sufiicient strength to turn said work support into operative position, means carried by said treadle rod and operated by the further depression of said treadle for starting the machine and a-spring for raising said treadle and returning said work support to a normally inoperative position after the pressure on said treadle is released.

'7. In a machine of the class described, a work support provided with a pair of parallel depending bell-crank arms, said arms being pivotally mounted, a lever operatively connected at one end to said arms for moving said work support into and out of operative position, a foot treadle, resilient connections between said foot treadle and the other end of said lever including a treadle rod and a spring intermediate said rod and said lever, said spring being of sufficient strength without distension to operate said lever to turn said work support into operative position on a preliminary depression of said foot treadle, said spring permitting further depression of said foot treadle after said work support'has reached operative position, a guide link connected at its upper end to said lever and provided with a slot through which said rod is connected to said spring and means operated by said further depression of said foot treadle for starting the machine in operation, said means comprising a block fixed to said treadle rod, a starting rod having its end loosely mounted in said block and having a collar adjustably secured thereto and adapted to be engaged by said block on the further depression of said foot treadle.

8. In a machine of the class described, a pivotally mounted work support, a lever operatively connected at one end to said Work support, a foot treadle, resilient connections between said foot treadle and the other end of said lever including a treadle rod and a spring intermediate said rod and said lever, said spring being of suficient strength without distension to operate said lever to turn said work support into operative position on a preliminary depression of said foot treadle, said spring permitting further depression of said foot treadle after said work support has reached operative position, a guide link connected at its upper end to said lever and provided with a slot through which said rod is connected to said spring, means carried by said treadle rod and operated by said further depression of said foot treadle for starting the machine in operation and a spring for raising said treadle and returning said work support to a normally inoperative position after the pressure on said treadle is released.

9. In a machine of the class described, the combination of a work support having a pair of depending bell-crank arms, said arms being pivotally mounted for moving said work support into and out of operative position, a lever pivotally mounted between its ends and connected at one end to said arms, a foot treadle, a treadle rod,

a spring'connecting said treadle rod with the other end of said lever, said spring being ofsufilcient strength without distension to turn said work support to operative position when said treadle is partially depressed and being distensible to permit further depression of said treadle after said .work support has reached operative position, a block fastened to the upper .end of said treadle rod andiprovided with a vertical bore, a starting lever having its lower end passed through thebore in said block and having a collar adjustably fastened thereto below said block in position to be engaged by said block on the further depression of said treadle for-starting the machine in operation.

10. In a machine of the class described, the

combination ofva work vsupport having a pair of depending bell-crank arms, said arms being pivotally mounted for moving said work support into and out of operative position, a lever pivotally mounted between its ends and connected at one end to said arms, a foot treadle, a treadle rod, a spring connecting said treadle rod with the other end ofsaid .lever, a block fastened to the upper end of said treadle rod and provided with -a vertical bore, astartinglever having its lower endpassedzthroughnsaidbore and having a collar adjustably fastened thereto below said block in position to be engaged by said block on the final depression of said treadle lforstarting the machine in operation.

ARTHUR .R. ,HAVENER. 

